ABSTRACT
The inner layer scales formed at 600°C in 3%CO-CO2 on two Fe-11Cr-Si alloys with differing Si contents are examined using cross-sectional TEM. Different types of oxide were found exhibiting chemistry changes with time. While the processes seen are dominated by the formation of SiO2 at the metal-oxide interface the way the scaling is also critically affected by carbon not diffusing into the sub-scale alloy is discussed.
